Results 21 to 30 of about 204,693 (339)

Attainment of reproductive competence, phase transition, and quantification of juvenility in mutant genetic screens [PDF]

open access: yes, 2014
Plant development between seedling emergence and flowering is characterized by a series of successive qualitative phases: (1) a post embryonic photoperiodinsensitive phase, during which plants are insensitive to photoperiod; (2) a photoperiod ...
Matsoukas, Ioannis G.
core   +2 more sources

To what extent does photoperiod affect cattle reproduction? Clinical perspectives of melatonin administration [PDF]

open access: yes, 2020
The seasonality of reproduction in most mammals is dictated by photoperiod, temperature and nutrition. Melatonin, mainly synthesized in the pineal gland, is generally accepted as the active mediator of photoperiod responses including reproduction.
De Rensis, F.   +3 more
core   +1 more source

Determination of photoperiod-sensitive phase in chickpea (Cicer arietinum L).

open access: yesFrontiers in Plant Science, 2016
Photoperiod is one of the major environmental factors determining time to flower initiation and first flower appearance in plants. In chickpea, photoperiod sensitivity, expressed as delayed to flower under short days as compared to long days, may change ...
Ketema eDaba   +4 more
doaj   +1 more source

Mapping QTL associated with photoperiod sensitivity and assessing the importance of QTL×environment interaction for flowering time in maize. [PDF]

open access: yesPLoS ONE, 2010
An understanding of the genetic determinism of photoperiod response of flowering is a prerequisite for the successful exchange of germplasm across different latitudes.
Cuiling Wang   +6 more
doaj   +1 more source

Phenological Restriction of the Oryza (v3) Model [PDF]

open access: yesRevista Brasileira de Meteorologia
Photoperiod sensitivity affects the rice development cycle and its flowering. Crop simulation models, such as ORYZA (v3), use equations that depend on two main parameters calibrated by the user: sensitivity to photoperiod and minimum optimal photoperiod.
Gutemberg Resende Honorio Filho   +5 more
doaj   +1 more source

Seasonal changes in moult, body mass and reproductive condition in siskins Carduelis spinus exposed to daylength regimes simulating different latitudes [PDF]

open access: yes, 2011
Birds use change in daylength during the year to time events during their annual cycles. Individual Eurasian siskins Carduelis spinus can breed and winter in widely separated areas in different years.
Dawson, Alistair, Newton, Ian
core   +2 more sources

Photoperiodic Response of Abrostola asclepiadis (Lepidoptera: Noctuidae), a Candidate Biological Control Agent for Swallow-worts (Vincetoxicum, Apocynaceae) [PDF]

open access: yes, 2020
A biological control program is in development for two swallow-wort species (Vincetoxicum, Apocynaceae), European vines introduced into northeastern North America.
Biazzo, Jeromy   +4 more
core   +2 more sources

Inheritance pattern of photoperiod responsive flowering, growth habit and flower colour in Indian bean [Lablab purpureus (L.) Sweet.]

open access: yesElectronic Journal of Plant Breeding, 2019
Photoperiod responsive flowering and growth habit have played key role in evolution and domestication of Indian bean. Most of the land races of this crop exhibit photoperiod sensitive flowering and indeterminate growth habit.
Kaushal Modha   +4 more
doaj   +1 more source

Latitudinal trends in human primary activities: characterizing the winter day as a synchronizer [PDF]

open access: yes, 2017
This work analyzes time use surveys from 19 countries (17 European and 2 American) in the middle latitude range from 38{\deg} to 61{\deg} latitude accounting for 45% of world population in that range.
Martin-Olalla, Jose Maria
core   +3 more sources

Short photoperiod-induced decrease of histamine H3 receptors facilitates activation of hypothalamic neurons in the Siberian Hamster [PDF]

open access: yes, 2009
Nonhibernating seasonal mammals have adapted to temporal changes in food availability through behavioral and physiological mechanisms to store food and energy during times of predictable plenty and conserve energy during predicted shortage.
Bamshad   +46 more
core   +1 more source

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